Same here. Latest upload got an internal server error warning from App Store Connect and builds are now approaching 24 hours of processing when normally it takes under 10 minutes. Of course, https://developer.apple.com/system-status shows all systems go, so no indication of whether Apple even sees the issue let alone when it will resolve.

Thanks for chiming in here as well as on the other thread, Kevin! I appreciate the precision and promptness. I believe the only way to do this at the moment is to stream the incoming video like any other video feed while using a PlayAndRecord audio session to capture audio from the user. This is exactly what we switched to trying after I posted. Hats off to the AI bots for being able to help us prototype this approach quickly. Our preliminary results indicate that we will still be able to use some LCK call signaling with this approach, which is nice since we want users to have a native-feeling experience. Once we finalize our approach here I might take you up on submitting a feedback (although tbh I think the watchOS team is getting sick of us submitting demanding Feedbacks).